Task ID
OperationsTask ID
readinterface
Examples
The following example shows the output from the show spanning-tree mst command, which produces details
on the BPDUs being output and received on a given local interface:
Several received packets can be stored in case of MSTP operating on a shared LAN.Note
RP/0/RSP0/CPU0:router# show spanning-tree mst a bpdu interface GigabitEthernet0/1/2/2
direction transmit
MSTI 0 (CIST):
Root ID : 0004.9b78.0800
Path Cost : 83
Bridge ID : 0004.9b78.0800
Port ID : 12
Hello Time : 2
...
Related Commands
DescriptionCommand
Enables debugging for sent and received MSTP packets.debug spanning-tree mst packet, on page 479
Enables debugging protocol-state changes such as port role
or state changes, topology change notification.
debug spanning-tree mst protocol-state, on
page 481
Displays the internal MSTI number and number of ports for
each VLAN.
show l2vpn mstp port, on page 585
Displays the Multiple Spanning Tree Protocol (MSTP) state
for the virtual local area network (VLAN) on a given interface.
show l2vpn mstp vlan, on page 587
Displays the multiple spanning tree protocol status
information.
show spanning-tree mst, on page 589
Displays the VLAN ID to MSTI mapping table.show spanning-tree mst configuration, on page
594
Displays information about misconfiguration affecting MSTP.show spanning-tree mst errors, on page 596
Displays detailed information on the interface state.show spanning-tree mst interface, on page 598
Displays details of the last topology change that occurred for
each pair of port and instance.
show spanning-tree mst topology-change
flushes, on page 601
Enters the MSTP configuration submodespanning-tree mst, on page 623
Cisco ASR 9000 Series Aggregation Services Router VPN and Ethernet Services Command Reference, Release
6.1.x
593
Multiple Spanning Tree Protocol Commands
show spanning-tree mst bpdu interface
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